To make this easier, you can put applications into the finder toolbar. For example, I have textedit sitting up there for when I want to force a document to open in that rather than, say, Safari for.html files.
Since I haven't seen it mentioned yet, and it seems to fit the topic: (though I haven't RTFA, where do you think we are...?)
I've been following the blog for a while, because of the developer videos they used to do, and they seem to be a very open development team. The articles they do almost daily are detailed and informative, especially to those like me that have an interest in game development, and I'm gonna stop now because I've realised I'm gushing:P